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Financial distress prediction is a major issue in the burgeoning fintech field. Given the importance of the reliability of the prediction results, there is an urgent need for the explanatory ability of the financial distress prediction model. From the modeling and explanation point of view, this study employs four prevailing tree‐based gradient boosting models, namely, gradient boosting decision tree,...
Identifying short message services (SMSs) seed users helps to discover the information’s originals and transmission paths. A tree-network model was proposed to depict the characteristics of SMS seed users who have such three features as “ahead of time”, “mass texting” and “numerous retransmissions”. For acquiring the established network model’s width and depth, a clustering algorithm based on density...
In this paper, a novel low-power high-efficiency switching-capacitor DC-DC voltage converter based on the combination of static CTS (Charge-Transfer-switch) charge pump and cross-coupled charge pump is presented. At this time, some motivated methods to overcome both the reverse charge sharing problem of traditional static CTS charge pump and the problem of threshold drop at the output stage are proposed...
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